Truck cap



FIG. 1 is a perspective view of the top, rear and one side of a truck cap showing my new design it being understood that the broken line showing of a pickup truck is for illustrative purposes only and forms no part of the claimed design; and,

FIG. 2 is an enlarged perspective view of the top, front and side thereof shown in FIG. 1 it being understood that the opposite side is a mirror image of that shown. 

The ornamental design for a truck cap, as shown and described. 